2.4.0.8 Html 1402 466 1 true 179 0 false 10 false false R1.htm 000000 - Document - Document and Entity Information Sheet http://www.aep.com/role/DocumentDocumentAndEntityInformation Document and Entity Information false false R2.htm 000110 - Statement - Consolidated Statements of Income Sheet http://www.aep.com/role/StatementConsolidatedStatementsOfIncome Consolidated Statements of Income false false R3.htm 000120 - Statement - Consolidated Statements of Comprehensive Income (Loss) Sheet http://www.aep.com/role/StatementConsolidatedStatementsOfComprehensiveIncomeLoss Consolidated Statements of Comprehensive Income (Loss) false false R4.htm 000121 - Statement - Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) Sheet http://www.aep.com/role/StatementConsolidatedStatementsOfComprehensiveIncomeLossParenthetical Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) false false R5.htm 000130 - Statement - Condensed Consolidated Statements of Changes in Equity Sheet http://www.aep.com/role/StatementCondensedConsolidatedStatementsOfChangesInEquity Condensed Consolidated Statements of Changes in Equity true false R6.htm 000140 - Statement - Condensed Consolidated Balance Sheets Sheet http://www.aep.com/role/StatementCondensedConsolidatedBalanceSheets Condensed Consolidated Balance Sheets false false R7.htm 000141 - Statement - Condensed Consolidated Balance Sheets (Parenthetical) Sheet http://www.aep.com/role/StatementCondensedConsolidatedBalanceSheetsParenthetical Condensed Consolidated Balance Sheets (Parenthetical) false false R8.htm 000150 - Statement - Condensed Consolidated Statements of Cash Flows Sheet http://www.aep.com/role/StatementCondensedConsolidatedStatementsOfCashFlows Condensed Consolidated Statements of Cash Flows false false R9.htm 000300 - Disclosure - Significant Accounting Matters Sheet http://www.aep.com/role/DisclosureSignificantAccountingMatters Significant Accounting Matters false false R10.htm 000305 - Disclosure - New Accounting Pronouncements Sheet http://www.aep.com/role/DisclosureNewAccountingPronouncements New Accounting Pronouncements false false R11.htm 000307 - Disclosure - Comprehensive Income Sheet http://www.aep.com/role/DisclosureComprehensiveIncome Comprehensive Income false false R12.htm 000310 - Disclosure - Rate Matters Sheet http://www.aep.com/role/DisclosureRateMatters Rate Matters false false R13.htm 000315 - Disclosure - Commitments, Guarantees and Contingencies Sheet http://www.aep.com/role/DisclosureCommitmentsGuaranteesAndContingencies Commitments, Guarantees and Contingencies false false R14.htm 000325 - Disclosure - Benefit Plans Sheet http://www.aep.com/role/DisclosureBenefitPlans Benefit Plans false false R15.htm 000330 - Disclosure - Business Segments Sheet http://www.aep.com/role/DisclosureBusinessSegments Business Segments false false R16.htm 000335 - Disclosure - Derivatives and Hedging Sheet http://www.aep.com/role/DisclosureDerivativesAndHedging Derivatives and Hedging false false R17.htm 000345 - Disclosure - Fair Value Measurements Sheet http://www.aep.com/role/DisclosureFairValueMeasurements Fair Value Measurements false false R18.htm 000350 - Disclosure - Income Taxes Sheet http://www.aep.com/role/DisclosureIncomeTaxes Income Taxes false false R19.htm 000355 - Disclosure - Financing Activities Sheet http://www.aep.com/role/DisclosureFinancingActivities Financing Activities false false R20.htm 000357 - Disclosure - Variable Interest Entities Sheet http://www.aep.com/role/DisclosureVariableInterestEntities Variable Interest Entities false false R21.htm 000400 - Disclosure - Significant Accounting Matters (Policies) Sheet http://www.aep.com/role/DisclosureSignificantAccountingMattersPolicies Significant Accounting Matters (Policies) false false R22.htm 000435 - Disclosure - Derivatives and Hedging (Policies) Sheet http://www.aep.com/role/DerivativesAndHedgingPolicies Derivatives and Hedging (Policies) false false R23.htm 000445 - Disclosure - Fair Value Measurements (Policies) Sheet http://www.aep.com/role/FairValueMeasurementsPolicies Fair Value Measurements (Policies) false false R24.htm 000450 - Disclosure - Income Taxes (Policies) Sheet http://www.aep.com/role/IncomeTaxesPolicies Income Taxes (Policies) false false R25.htm 000457 - Disclosure - Variable Interest Entities (Policies) Sheet http://www.aep.com/role/VariableInterestEntitiesPolicies Variable Interest Entities (Policies) false false R26.htm 000500 - Disclosure - Significant Accounting Matters (Tables) Sheet http://www.aep.com/role/DisclosureSignificantAccountingMattersTables Significant Accounting Matters (Tables) false false R27.htm 000507 - Disclosure - Comprehensive Income (Tables) Sheet http://www.aep.com/role/DisclosureComprehensiveIncomeTables Comprehensive Income (Tables) false false R28.htm 000510 - Disclosure - Rate Matters (Tables) Sheet http://www.aep.com/role/RateMattersTables Rate Matters (Tables) false false R29.htm 000515 - Disclosure - Commitments, Guarantees and Contingencies (Tables) Sheet http://www.aep.com/role/DisclosureCommitmentsGuaranteesAndContingenciesTables Commitments, Guarantees and Contingencies (Tables) false false R30.htm 000525 - Disclosure - Benefit Plans (Tables) Sheet http://www.aep.com/role/BenefitPlansTables Benefit Plans (Tables) false false R31.htm 000530 - Disclosure - Business Segments (Tables) Sheet http://www.aep.com/role/BusinessSegmentsTables Business Segments (Tables) false false R32.htm 000535 - Disclosure - Derivatives and Hedging (Tables) Sheet http://www.aep.com/role/DisclosureDerivativesAndHedgingTables Derivatives and Hedging (Tables) false false R33.htm 000545 - Disclosure - Fair Value Measurements (Tables) Sheet http://www.aep.com/role/DisclosureFairValueMeasurementsTables Fair Value Measurements (Tables) false false R34.htm 000555 - Disclosure - Financing Activities (Tables) Sheet http://www.aep.com/role/DisclosureFinancingActivitiesTables Financing Activities (Tables) false false R35.htm 000557 - Disclosure - Variable Interest Entities (Tables) Sheet http://www.aep.com/role/DisclosureVariableInterestEntitiesTables Variable Interest Entities (Tables) false false R36.htm 000600 - Disclosure - Significant Accounting Matters (Details) Sheet http://www.aep.com/role/DisclosureSignificantAccountingMattersDetails Significant Accounting Matters (Details) false false R37.htm 000607 - Disclosure - Comprehensive Income (Details) Sheet http://www.aep.com/role/DisclosureComprehensiveIncomeDetails Comprehensive Income (Details) false false R38.htm 000610 - Disclosure - Rate Matters (Details) Sheet http://www.aep.com/role/DisclosureRateMattersDetails Rate Matters (Details) false false R39.htm 000615 - Disclosure - Commitments, Guarantees and Contingencies (Details) Sheet http://www.aep.com/role/DisclosureCommitmentsGuaranteesAndContingenciesDetails Commitments, Guarantees and Contingencies (Details) false false R40.htm 000620 - Disclosure - Acquisitions Dispositions and Discontinued Operations (Details) Sheet http://www.aep.com/role/DisclosureAcquisitionsDispositionsAndDiscontinuedOperationsDetails Acquisitions Dispositions and Discontinued Operations (Details) false false R41.htm 000625 - Disclosure - Benefit Plans (Details) Sheet http://www.aep.com/role/DisclosureBenefitPlansDetails Benefit Plans (Details) false false R42.htm 000630 - Disclosure - Business Segments (Details) Sheet http://www.aep.com/role/DisclosureBusinessSegmentsDetails Business Segments (Details) false false R43.htm 000635 - Disclosure - Derivatives and Hedging (Details) Sheet http://www.aep.com/role/DisclosureDerivativesAndHedgingDetails Derivatives and Hedging (Details) false false R44.htm 000645 - Disclosure - Fair Value Long-term Debt, Other Temporary Investments, Nuclear Trusts (Details) Sheet http://www.aep.com/role/DisclosureFairValueLongtermDebtOtherTemporaryInvestmentsNuclearTrustsDetails Fair Value Long-term Debt, Other Temporary Investments, Nuclear Trusts (Details) false false R45.htm 000646 - Disclosure - Fair Value Assets and Liabilities (Details) Sheet http://www.aep.com/role/DisclosureFairValueAssetsAndLiabilitiesDetails Fair Value Assets and Liabilities (Details) false false R46.htm 000650 - Disclosure - Income Taxes (Details) Sheet http://www.aep.com/role/DisclosureIncomeTaxesDetails Income Taxes (Details) false false R47.htm 000655 - Disclosure - Financing Activities (Details) Sheet http://www.aep.com/role/DisclosureFinancingActivitiesDetails Financing Activities (Details) false false R48.htm 000657 - Disclosure - Variable Interest Entities (Details) Sheet http://www.aep.com/role/DisclosureVariableInterestEntitiesDetails Variable Interest Entities (Details) false false All Reports Book All Reports Element aep_AccountsReceivableCustomers had a mix of decimals attribute values: -6 -3. Element aep_AmortizationOfNuclearFuel had a mix of decimals attribute values: -6 -3. Element aep_AmountAttributableToRtoAndIsoActivities had a mix of decimals attribute values: -6 -3. Element aep_ApprovedReturnOnEquity had a mix of decimals attribute values: 0 3. Element aep_CarryingCostsIncome had a mix of decimals attribute values: -6 -3. Element aep_ChangesInFairValueAllocatedToRegulatedJurisdiction had a mix of decimals attribute values: -6 -3. Element aep_DeferralOfOhioCapacityCosts had a mix of decimals attribute values: -6 -3. Element aep_DerivativeNonmonetaryEnergyNotionalAmount had a mix of decimals attribute values: -6 -3. Element aep_DerivativeNonmonetaryMassNotionalAmount had a mix of decimals attribute values: -6 -3. Element aep_DerivativeNonmonetaryVolumeNotionalAmount had a mix of decimals attribute values: -6 -3. Element aep_DerivativeRiskManagementContractsGainLossRecognizedAsRegulatoryAssetLiability had a mix of decimals attribute values: -6 -3. Element aep_EmployeeBenefitsAndPensionObligations had a mix of decimals attribute values: -6 -3. Element aep_FairValueOfDerivativeLiabilitiesSubjectToCrossDefaultProvisions had a mix of decimals attribute values: -6 -3. Element aep_FuelOverUnderRecoveryNet had a mix of decimals attribute values: -6 -3. Element aep_GrossRealizedGainsOnInvestmentSales had a mix of decimals attribute values: -6 -3. Element aep_GrossRealizedLossesOnInvestmentSales had a mix of decimals attribute values: -6 -3. Element aep_GrossUnrealizedGains had a mix of decimals attribute values: -6 -3. Element aep_HedgingAssets had a mix of decimals attribute values: -6 -3. Element aep_HedgingLiabilities had a mix of decimals attribute values: -6 -3. Element aep_MaximumFuturePaymentsForLettersOfCredit had a mix of decimals attribute values: -6 -3. Element aep_MaxPotentialLossOnMasterLeaseAgreements had a mix of decimals attribute values: -6 -3. Element aep_OtherComprehensiveIncomeUnrealizedGainLossArisingDuringPeriodNetOfTax had a mix of decimals attribute values: -6 -3. Element aep_ProceedsFromInvestmentSales had a mix of decimals attribute values: -6 -3. Element aep_ProjectedCapitalCosts had a mix of decimals attribute values: -8 -6. Element aep_PurchasesOfInvestments had a mix of decimals attribute values: -6 -3. Element aep_ReclassificationsIntoPropertyPlantAndEquipment had a mix of decimals attribute values: -6 -3. Element aep_ReclassificationsIntoRegulatoryAssetsOrLiabilitiesNet had a mix of decimals attribute values: -6 -3. Element aep_SpentNuclearFuelAndDecommissioningTrusts had a mix of decimals attribute values: -6 -3. Element aep_TemporaryImpairments had a mix of decimals attribute values: -6 -3. Element aep_VariableInterestCarryingAmountLiabilitiesAndEquity had a mix of decimals attribute values: -6 -3. Element aep_VariableRatePcbsSupported had a mix of decimals attribute values: -6 -3. Element invest_DerivativeNotionalAmount had a mix of decimals attribute values: -6 -3. Element us-gaap_AccountsPayableCurrent had a mix of decimals attribute values: -6 -3. Element us-gaap_AccountsReceivableNetCurrent had a mix of decimals attribute values: -6 -3. Element us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment had a mix of decimals attribute values: -6 -3. Element us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax had a mix of decimals attribute values: -6 -3. Element us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax had a mix of decimals attribute values: -6 -3. Element us-gaap_AdditionalCollateralAggregateFairValue had a mix of decimals attribute values: -6 -3. Element us-gaap_AdditionalPaidInCapital had a mix of decimals attribute values: -6 -3. Element us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent had a mix of decimals attribute values: -6 -3. Element us-gaap_AmortizationOfDeferredPropertyTaxes had a mix of decimals attribute values: -6 -3. Element us-gaap_AssetRetirementObligationsNoncurrent had a mix of decimals attribute values: -6 -3. Element us-gaap_Assets had a mix of decimals attribute values: -6 -3. Element us-gaap_AssetsCurrent had a mix of decimals attribute values: -6 -3. Element us-gaap_AssetsFairValueDisclosure had a mix of decimals attribute values: -6 -3. Element us-gaap_AssetsNeededForImmediateSettlementAggregateFairValue had a mix of decimals attribute values: -6 -3. Element us-gaap_AssetsNoncurrent had a mix of decimals attribute values: -6 -3. Element us-gaap_CapitalLeaseObligationsIncurred had a mix of decimals attribute values: -6 -3. Element us-gaap_CashAndCashEquivalentsAtCarryingValue had a mix of decimals attribute values: -6 -3. Element us-gaap_CashAndCashEquivalentsFairValueDisclosure had a mix of decimals attribute values: -6 -3. Element us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease had a mix of decimals attribute values: -6 -3. Element us-gaap_CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths had a mix of decimals attribute values: -6 -3. Element us-gaap_CollateralAlreadyPostedAggregateFairValue had a mix of decimals attribute values: -6 -3. Element us-gaap_CommonStockSharesIssued had a mix of decimals attribute values: -6 0. Element us-gaap_CommonStockValue had a mix of decimals attribute values: -6 -3. Element us-gaap_ComprehensiveIncomeNetOfTax had a mix of decimals attribute values: -6 -3. Element us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest had a mix of decimals attribute values: -6 -3. Element us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest had a mix of decimals attribute values: -6 -3. Element us-gaap_ConstructionInProgressExpendituresIncurredButNotYetPaid had a mix of decimals attribute values: -6 -3. Element us-gaap_ConstructionInProgressGross had a mix of decimals attribute values: -6 -3. Element us-gaap_CostOfPurchasedPower had a mix of decimals attribute values: -6 -3. Element us-gaap_CustomerDepositsCurrent had a mix of decimals attribute values: -6 -3. Element us-gaap_DeferredIncomeTaxExpenseBenefit had a mix of decimals attribute values: -6 -3. Element us-gaap_DeferredTaxLiabilitiesNoncurrent had a mix of decimals attribute values: -6 -3. Element us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses had a mix of decimals attribute values: -6 -3. Element us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit had a mix of decimals attribute values: -6 -3. Element us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets had a mix of decimals attribute values: -6 -3. Element us-gaap_DefinedBenefitPlanInterestCost had a mix of decimals attribute values: -6 -3. Element us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost had a mix of decimals attribute values: -6 -3. Element us-gaap_DefinedBenefitPlanServiceCost had a mix of decimals attribute values: -6 -3. Element us-gaap_DerivativeAssets had a mix of decimals attribute values: -6 -3. Element us-gaap_DerivativeAssetsCurrent had a mix of decimals attribute values: -6 -3. Element us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet had a mix of decimals attribute values: -6 -3. Element us-gaap_DerivativeAssetsNoncurrent had a mix of decimals attribute values: -6 -3. Element us-gaap_DerivativeLiabilities had a mix of decimals attribute values: -6 -3. Element us-gaap_DerivativeLiabilitiesCurrent had a mix of decimals attribute values: -6 -3. Element us-gaap_DerivativeLiabilitiesNoncurrent had a mix of decimals attribute values: -6 -3. Element us-gaap_DerivativeNetLiabilityPositionAggregateFairValue had a mix of decimals attribute values: -6 -3. Element us-gaap_DividendsCommonStock had a mix of decimals attribute values: -6 -3. Element us-gaap_ElectricalTransmissionAndDistributionRevenue had a mix of decimals attribute values: -6 -3. Element us-gaap_ElectricProductionExpense had a mix of decimals attribute values: -6 -3. Element us-gaap_ElectricUtilityRevenue had a mix of decimals attribute values: -6 -3. Element us-gaap_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss had a mix of decimals attribute values: -6 -3. Element us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1 had a mix of decimals attribute values: -6 -3. Element us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss had a mix of decimals attribute values: -6 -3. Element us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchasesSalesIssuancesSettlements had a mix of decimals attribute values: -6 -3. Element us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3 had a mix of decimals attribute values: -6 -3. Element us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3 had a mix of decimals attribute values: -6 -3. Element us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue had a mix of decimals attribute values: -6 -3. Element us-gaap_GainLossOnDerivativeInstrumentsNetPretax had a mix of decimals attribute values: -6 -3. Element us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments had a mix of decimals attribute values: -6 -3. Element us-gaap_IncomeLossFromEquityMethodInvestments had a mix of decimals attribute values: -6 -3. Element us-gaap_IncomeTaxesPaidNet had a mix of decimals attribute values: -6 -3. Element us-gaap_IncomeTaxExpenseBenefit had a mix of decimals attribute values: -6 -3. Element us-gaap_IncreaseDecreaseInAccountsAndOtherReceivables had a mix of decimals attribute values: -6 -3. Element us-gaap_IncreaseDecreaseInAccountsPayable had a mix of decimals attribute values: -6 -3. Element us-gaap_IncreaseDecreaseInAccruedTaxesPayable had a mix of decimals attribute values: -6 -3. Element us-gaap_IncreaseDecreaseInInventories had a mix of decimals attribute values: -6 -3. Element us-gaap_IncreaseDecreaseInOtherCurrentAssets had a mix of decimals attribute values: -6 -3. Element us-gaap_IncreaseDecreaseInOtherCurrentLiabilities had a mix of decimals attribute values: -6 -3. Element us-gaap_IncreaseDecreaseInOtherNoncurrentAssets had a mix of decimals attribute values: -6 -3. Element us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities had a mix of decimals attribute values: -6 -3. Element us-gaap_InterestExpense had a mix of decimals attribute values: -6 -3. Element us-gaap_InterestPaidNet had a mix of decimals attribute values: -6 -3. Element us-gaap_InterestPayableCurrent had a mix of decimals attribute values: -6 -3. Element us-gaap_InventoryRawMaterials had a mix of decimals attribute values: -6 -3. Element us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures had a mix of decimals attribute values: -6 -3. Element us-gaap_LettersOfCreditOutstandingAmount had a mix of decimals attribute values: -6 -3. Element us-gaap_Liabilities had a mix of decimals attribute values: -6 -3. Element us-gaap_LiabilitiesAndStockholdersEquity had a mix of decimals attribute values: -6 -3. Element us-gaap_LiabilitiesCurrent had a mix of decimals attribute values: -6 -3. Element us-gaap_LiabilitiesNoncurrent had a mix of decimals attribute values: -6 -3. Element us-gaap_LongTermDebt had a mix of decimals attribute values: -6 -3. Element us-gaap_LongTermDebtCurrent had a mix of decimals attribute values: -6 -3. Element us-gaap_LongTermDebtFairValue had a mix of decimals attribute values: -6 -3. Element us-gaap_LongTermDebtNoncurrent had a mix of decimals attribute values: -6 -3. Element us-gaap_MinorityInterest had a mix of decimals attribute values: -6 -3. Element us-gaap_NetCashProvidedByUsedInFinancingActivities had a mix of decimals attribute values: -6 -3. Element us-gaap_NetCashProvidedByUsedInInvestingActivities had a mix of decimals attribute values: -6 -3. Element us-gaap_NetCashProvidedByUsedInOperatingActivities had a mix of decimals attribute values: -6 -3. Element us-gaap_NetIncomeLoss had a mix of decimals attribute values: -6 -3. Element us-gaap_NetIncomeLossAttributableToNoncontrollingInterest had a mix of decimals attribute values: -6 -3. Element us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic had a mix of decimals attribute values: -6 -3. Element us-gaap_ObligationToReturnSecuritiesReceivedAsCollateral had a mix of decimals attribute values: -6 -3. Element us-gaap_OperatingExpenses had a mix of decimals attribute values: -6 -3. Element us-gaap_OperatingIncomeLoss had a mix of decimals attribute values: -6 -3. Element us-gaap_OtherAssetsNoncurrent had a mix of decimals attribute values: -6 -3. Element us-gaap_OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax had a mix of decimals attribute values: -6 -3. Element us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax had a mix of decimals attribute values: -6 -3. Element us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax had a mix of decimals attribute values: -6 -3. Element us-gaap_OtherComprehensiveIncomeLossNetOfTax had a mix of decimals attribute values: -6 -3. Element us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax had a mix of decimals attribute values: -6 -3. Element us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax had a mix of decimals attribute values: -6 -3. Element us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax had a mix of decimals attribute values: -6 -3. Element us-gaap_OtherInventorySupplies had a mix of decimals attribute values: -6 -3. Element us-gaap_OtherLiabilitiesCurrent had a mix of decimals attribute values: -6 -3. Element us-gaap_OtherLiabilitiesNoncurrent had a mix of decimals attribute values: -6 -3. Element us-gaap_OtherReceivables had a mix of decimals attribute values: -6 -3. Element us-gaap_OtherSalesRevenueNet had a mix of decimals attribute values: -6 -3. Element us-gaap_PaymentsForConstructionInProcess had a mix of decimals attribute values: -6 -3. Element us-gaap_PaymentsForNuclearFuel had a mix of decimals attribute values: -6 -3. Element us-gaap_PaymentsForProceedsFromOtherInvestingActivities had a mix of decimals attribute values: -6 -3. Element us-gaap_PaymentsOfDividendsCommonStock had a mix of decimals attribute values: -6 -3. Element us-gaap_PaymentsToAcquireInvestments had a mix of decimals attribute values: -6 -3. Element us-gaap_PrepaidExpenseAndOtherAssetsCurrent had a mix of decimals attribute values: -6 -3. Element us-gaap_ProceedsFromInsuranceSettlementInvestingActivities had a mix of decimals attribute values: -6 -3. Element us-gaap_ProceedsFromIssuanceOfDebt had a mix of decimals attribute values: -6 -3. Element us-gaap_ProceedsFromIssuanceOfLongTermDebt had a mix of decimals attribute values: -6 -3. Element us-gaap_ProceedsFromPaymentsForOtherFinancingActivities had a mix of decimals attribute values: -6 -3. Element us-gaap_ProceedsFromSaleMaturityAndCollectionsOfInvestments had a mix of decimals attribute values: -6 -3. Element us-gaap_ProceedsFromShortTermDebtMaturingInMoreThanThreeMonths had a mix of decimals attribute values: -6 -3. Element us-gaap_ProfitLoss had a mix of decimals attribute values: -6 -3. Element us-gaap_PropertyPlantAndEquipmentGross had a mix of decimals attribute values: -6 -3. Element us-gaap_PropertyPlantAndEquipmentNet had a mix of decimals attribute values: -6 -3. Element us-gaap_PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity had a mix of decimals attribute values: -6 -3. Element us-gaap_PublicUtilitiesPropertyPlantAndEquipmentDistribution had a mix of decimals attribute values: -6 -3. Element us-gaap_PublicUtilitiesPropertyPlantAndEquipmentGenerationOrProcessing had a mix of decimals attribute values: -6 -3. Element us-gaap_PublicUtilitiesPropertyPlantAndEquipmentOtherPropertyPlantAndEquipment had a mix of decimals attribute values: -6 -3. Element us-gaap_PublicUtilitiesPropertyPlantAndEquipmentTransmission had a mix of decimals attribute values: -6 -3. Element us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax had a mix of decimals attribute values: -6 -3. Element us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax had a mix of decimals attribute values: -6 -3. Element us-gaap_RegulatoryAssetsCurrent had a mix of decimals attribute values: -6 -3. Element us-gaap_RegulatoryAssetsNoncurrent had a mix of decimals attribute values: -6 -3. Element us-gaap_RegulatoryLiabilityCurrent had a mix of decimals attribute values: -6 -3. Element us-gaap_RegulatoryLiabilityNoncurrent had a mix of decimals attribute values: -6 -3. Element us-gaap_RepaymentsOfLongTermCapitalLeaseObligations had a mix of decimals attribute values: -6 -3. Element us-gaap_RepaymentsOfLongTermDebt had a mix of decimals attribute values: -6 -3. Element us-gaap_RepaymentsOfShortTermDebtMaturingInMoreThanThreeMonths had a mix of decimals attribute values: -6 -3. Element us-gaap_RetainedEarningsAccumulatedDeficit had a mix of decimals attribute values: -6 -3. Element us-gaap_Revenues had a mix of decimals attribute values: -6 -3. Element us-gaap_SecuredDebt had a mix of decimals attribute values: -9 -6. Element us-gaap_SecuritiesReceivedAsCollateral had a mix of decimals attribute values: -6 -3. Element us-gaap_SecuritizedRegulatoryTransitionAssetsNoncurrent had a mix of decimals attribute values: -8 -6 -3. Element us-gaap_StockholdersEquity had a mix of decimals attribute values: -6 -3. Element us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest had a mix of decimals attribute values: -6 -3. Element us-gaap_TaxesExcludingIncomeAndExciseTaxes had a mix of decimals attribute values: -6 -3. Element us-gaap_TaxesPayableCurrent had a mix of decimals attribute values: -6 -3. Element us-gaap_UnbilledReceivablesCurrent had a mix of decimals attribute values: -6 -3. Element us-gaap_UnrealizedGainLossOnDerivatives had a mix of decimals attribute values: -6 -3. Element us-gaap_UtilitiesOperatingExpenseDepreciationAndAmortization had a mix of decimals attribute values: -6 -3. Element us-gaap_UtilitiesOperatingExpenseMaintenance had a mix of decimals attribute values: -6 -3. Element us-gaap_UtilitiesOperatingExpenseOperations had a mix of decimals attribute values: -6 -3. Element us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssets had a mix of decimals attribute values: -6 -3. Element us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount had a mix of decimals attribute values: -6 -3. 'Monetary' elements on report '000110 - Statement - Consolidated Statements of Income' had a mix of different decimal attribute values. 'Monetary' elements on report '000120 - Statement - Consolidated Statements of Comprehensive Income (Loss)' had a mix of different decimal attribute values. 'Monetary' elements on report '000121 - Statement - Consolidated Statements of Comprehensive Income (Loss) (Parenthetical)' had a mix of different decimal attribute values. 'Monetary' elements on report '000130 - Statement - Condensed Consolidated Statements of Changes in Equity' had a mix of different decimal attribute values. 'Monetary' elements on report '000140 - Statement - Condensed Consolidated Balance Sheets' had a mix of different decimal attribute values. 'Monetary' elements on report '000141 - Statement - Condensed Consolidated Balance Sheets (Parenthetical)' had a mix of different decimal attribute values. 'Monetary' elements on report '000150 - Statement - Condensed Consolidated Statements of Cash Flows' had a mix of different decimal attribute values. 'Monetary' elements on report '000607 - Disclosure - Comprehensive Income (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '000610 - Disclosure - Rate Matters (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '000615 - Disclosure - Commitments, Guarantees and Contingencies (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '000630 - Disclosure - Business Segments (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '000635 - Disclosure - Derivatives and Hedging (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '000645 - Disclosure - Fair Value Long-term Debt, Other Temporary Investments, Nuclear Trusts (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '000646 - Disclosure - Fair Value Assets and Liabilities (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '000650 - Disclosure - Income Taxes (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '000655 - Disclosure - Financing Activities (Details)' had a mix of different decimal attribute values. 'Monetary' elements on report '000657 - Disclosure - Variable Interest Entities (Details)' had a mix of different decimal attribute values. Process Flow-Through: 000110 - Statement - Consolidated Statements of Income Process Flow-Through: 000120 - Statement - Consolidated Statements of Comprehensive Income (Loss) Process Flow-Through: 000121 - Statement - Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) Process Flow-Through: 000140 - Statement - Condensed Consolidated Balance Sheets Process Flow-Through: Removing column 'Mar. 31, 2013' Process Flow-Through: Removing column 'Dec. 31, 2012' Process Flow-Through: 000141 - Statement - Condensed Consolidated Balance Sheets (Parenthetical) Process Flow-Through: Removing column 'Mar. 31, 2013' Process Flow-Through: Removing column 'Dec. 31, 2012' Process Flow-Through: 000150 - Statement - Condensed Consolidated Statements of Cash Flows aep-20140331.xml aep-20140331.xsd aep-20140331_cal.xml aep-20140331_def.xml aep-20140331_lab.xml aep-20140331_pre.xml true true